git.maemo.org Git - monky/blob - src/x11.c

   1 /* -*- mode: c; c-basic-offset: 4; tab-width: 4; indent-tabs-mode: t -*-
   2  * vim: ts=4 sw=4 noet ai cindent syntax=c
   3  *
   4  * Conky, a system monitor, based on torsmo
   5  *
   6  * Any original torsmo code is licensed under the BSD license
   7  *
   8  * All code written since the fork of torsmo is licensed under the GPL
   9  *
  10  * Please see COPYING for details
  11  *
  12  * Copyright (c) 2004, Hannu Saransaari and Lauri Hakkarainen
  13  * Copyright (c) 2005-2009 Brenden Matthews, Philip Kovacs, et. al.
  14  *      (see AUTHORS)
  15  * All rights reserved.
  16  *
  17  * This program is free software: you can redistribute it and/or modify
  18  * it under the terms of the GNU General Public License as published by
  19  * the Free Software Foundation, either version 3 of the License, or
  20  * (at your option) any later version.
  21  *
  22  * This program is distributed in the hope that it will be useful,
  23  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  24  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  25  * GNU General Public License for more details.
  26  * You should have received a copy of the GNU General Public License
  27  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  28  *
  29  */
  30
  31 #include "config.h"
  32 #include "conky.h"
  33 #include "logging.h"
  34 #include "common.h"
  35
  36 #include "x11.h"
  37 #include <X11/Xlib.h>
  38 #include <X11/Xatom.h>
  39 #include <X11/Xmd.h>
  40 #include <X11/Xutil.h>
  41 #ifdef IMLIB2
  42 #include "imlib2.h"
  43 #endif /* IMLIB2 */
  44
  45 #ifdef XFT
  46 #include <X11/Xft/Xft.h>
  47 int use_xft = 0;
  48 #endif
  49
  50 #ifdef HAVE_XDBE
  51 int use_xdbe;
  52 #endif
  53
  54 /* some basic X11 stuff */
  55 Display *display = NULL;
  56 int display_width;
  57 int display_height;
  58 int screen;
  59 static int set_transparent;
  60 static int background_colour;
  61
  62 /* workarea from _NET_WORKAREA, this is where window / text is aligned */
  63 int workarea[4];
  64
  65 /* Window stuff */
  66 struct conky_window window;
  67
  68 /* local prototypes */
  69 static void update_workarea(void);
  70 static Window find_desktop_window(Window *p_root, Window *p_desktop);
  71 static Window find_subwindow(Window win, int w, int h);
  72
  73 /* X11 initializer */
  74 void init_X11(const char *disp)
  75 {
  76         if (!display) {
  77                 if ((display = XOpenDisplay(disp)) == NULL) {
  78                         CRIT_ERR(NULL, NULL, "can't open display: %s", XDisplayName(disp));
  79                 }
  80         }
  81
  82         screen = DefaultScreen(display);
  83         display_width = DisplayWidth(display, screen);
  84         display_height = DisplayHeight(display, screen);
  85
  86         get_x11_desktop_info(display, 0);
  87
  88         update_workarea();
  89 }
  90
  91 static void update_workarea(void)
  92 {
  93         /* default work area is display */
  94         workarea[0] = 0;
  95         workarea[1] = 0;
  96         workarea[2] = display_width;
  97         workarea[3] = display_height;
  98 }
  99
 100 /* Find root window and desktop window.
 101  * Return desktop window on success,
 102  * and set root and desktop byref return values.
 103  * Return 0 on failure. */
 104 static Window find_desktop_window(Window *p_root, Window *p_desktop)
 105 {
 106         Atom type;
 107         int format, i;
 108         unsigned long nitems, bytes;
 109         unsigned int n;
 110         Window root = RootWindow(display, screen);
 111         Window win = root;
 112         Window troot, parent, *children;
 113         unsigned char *buf = NULL;
 114
 115         if (!p_root || !p_desktop) {
 116                 return 0;
 117         }
 118
 119         /* some window managers set __SWM_VROOT to some child of root window */
 120
 121         XQueryTree(display, root, &troot, &parent, &children, &n);
 122         for (i = 0; i < (int) n; i++) {
 123                 if (XGetWindowProperty(display, children[i], ATOM(__SWM_VROOT), 0, 1,
 124                                         False, XA_WINDOW, &type, &format, &nitems, &bytes, &buf)
 125                                 == Success && type == XA_WINDOW) {
 126                         win = *(Window *) buf;
 127                         XFree(buf);
 128                         XFree(children);
 129                         fprintf(stderr,
 130                                         PACKAGE_NAME": desktop window (%lx) found from __SWM_VROOT property\n",
 131                                         win);
 132                         fflush(stderr);
 133                         *p_root = win;
 134                         *p_desktop = win;
 135                         return win;
 136                 }
 137
 138                 if (buf) {
 139                         XFree(buf);
 140                         buf = 0;
 141                 }
 142         }
 143         XFree(children);
 144
 145         /* get subwindows from root */
 146         win = find_subwindow(root, -1, -1);
 147
 148         update_workarea();
 149
 150         win = find_subwindow(win, workarea[2], workarea[3]);
 151
 152         if (buf) {
 153                 XFree(buf);
 154                 buf = 0;
 155         }
 156
 157         if (win != root) {
 158                 fprintf(stderr,
 159                                 PACKAGE_NAME": desktop window (%lx) is subwindow of root window (%lx)\n",
 160                                 win, root);
 161         } else {
 162                 fprintf(stderr, PACKAGE_NAME": desktop window (%lx) is root window\n", win);
 163         }
 164
 165         fflush(stderr);
 166
 167         *p_root = root;
 168         *p_desktop = win;
 169
 170         return win;
 171 }
 172
 173 /* sets background to ParentRelative for the Window and all parents */
 174 void set_transparent_background(Window win)
 175 {
 176         static int colour_set = -1;
 177
 178         if (set_transparent) {
 179                 Window parent = win;
 180                 unsigned int i;
 181
 182                 for (i = 0; i < 50 && parent != RootWindow(display, screen); i++) {
 183                         Window r, *children;
 184                         unsigned int n;
 185
 186                         XSetWindowBackgroundPixmap(display, parent, ParentRelative);
 187
 188                         XQueryTree(display, parent, &r, &parent, &children, &n);
 189                         XFree(children);
 190                 }
 191         } else if (colour_set != background_colour) {
 192                 XSetWindowBackground(display, win, background_colour);
 193                 colour_set = background_colour;
 194         }
 195 }
 196
 197 void destroy_window(void)
 198 {
 199         if(window.xftdraw) {
 200                 XftDrawDestroy(window.xftdraw);
 201         }
 202         if(window.gc) {
 203                 XFreeGC(display, window.gc);
 204         }
 205         memset(&window, 0, sizeof(struct conky_window));
 206 }
 207
 208 void init_window(int own_window, int w, int h, int set_trans, int back_colour,
 209                 char **argv, int argc)
 210 {
 211         /* There seems to be some problems with setting transparent background
 212          * (on fluxbox this time). It doesn't happen always and I don't know why it
 213          * happens but I bet the bug is somewhere here. */
 214         set_transparent = set_trans;
 215         background_colour = back_colour;
 216
 217 #ifdef OWN_WINDOW
 218         if (own_window) {
 219                 if (!find_desktop_window(&window.root, &window.desktop)) {
 220                         return;
 221                 }
 222
 223                 if (window.type == TYPE_OVERRIDE) {
 224
 225                         /* An override_redirect True window.
 226                          * No WM hints or button processing needed. */
 227                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 228                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask, 0L,
 229                                 True, 0, 0 };
 230
 231                         /* Parent is desktop window (which might be a child of root) */
 232                         window.window = XCreateWindow(display, window.desktop, window.x,
 233                                         window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 234                                         CWBackPixel | CWOverrideRedirect, &attrs);
 235
 236                         XLowerWindow(display, window.window);
 237
 238                         fprintf(stderr, PACKAGE_NAME": window type - override\n");
 239                         fflush(stderr);
 240                 } else { /* window.type != TYPE_OVERRIDE */
 241
 242                         /* A window managed by the window manager.
 243                          * Process hints and buttons. */
 244                         XSetWindowAttributes attrs = { ParentRelative, 0L, 0, 0L, 0, 0,
 245                                 Always, 0L, 0L, False, StructureNotifyMask | ExposureMask |
 246                                         ButtonPressMask | ButtonReleaseMask, 0L, False, 0, 0 };
 247
 248                         XClassHint classHint;
 249                         XWMHints wmHint;
 250                         Atom xa;
 251
 252                         if (window.type == TYPE_DOCK) {
 253                                 window.x = window.y = 0;
 254                         }
 255                         /* Parent is root window so WM can take control */
 256                         window.window = XCreateWindow(display, window.root, window.x,
 257                                         window.y, w, h, 0, CopyFromParent, InputOutput, CopyFromParent,
 258                                         CWBackPixel | CWOverrideRedirect, &attrs);
 259
 260                         classHint.res_name = window.class_name;
 261                         classHint.res_class = classHint.res_name;
 262
 263                         wmHint.flags = InputHint | StateHint;
 264                         /* allow decorated windows to be given input focus by WM */
 265                         wmHint.input =
 266                                 TEST_HINT(window.hints, HINT_UNDECORATED) ? False : True;
 267                         if (window.type == TYPE_DOCK || window.type == TYPE_PANEL) {
 268                                 wmHint.initial_state = WithdrawnState;
 269                         } else {
 270                                 wmHint.initial_state = NormalState;
 271                         }
 272
 273                         XmbSetWMProperties(display, window.window, window.title, NULL, argv,
 274                                         argc, NULL, &wmHint, &classHint);
 275
 276                         /* Sets an empty WM_PROTOCOLS property */
 277                         XSetWMProtocols(display, window.window, NULL, 0);
 278
 279                         /* Set window type */
 280                         if ((xa = ATOM(_NET_WM_WINDOW_TYPE)) != None) {
 281                                 Atom prop;
 282
 283                                 switch (window.type) {
 284                                         case TYPE_DESKTOP:
 285                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DESKTOP);
 286                                                 fprintf(stderr, PACKAGE_NAME": window type - desktop\n");
 287                                                 fflush(stderr);
 288                                                 break;
 289                                         case TYPE_DOCK:
 290                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 291                                                 fprintf(stderr, PACKAGE_NAME": window type - dock\n");
 292                                                 fflush(stderr);
 293                                                 break;
 294                                         case TYPE_PANEL:
 295                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_DOCK);
 296                                                 fprintf(stderr, PACKAGE_NAME": window type - panel\n");
 297                                                 fflush(stderr);
 298                                                 break;
 299                                         case TYPE_NORMAL:
 300                                         default:
 301                                                 prop = ATOM(_NET_WM_WINDOW_TYPE_NORMAL);
 302                                                 fprintf(stderr, PACKAGE_NAME": window type - normal\n");
 303                                                 fflush(stderr);
 304                                                 break;
 305                                 }
 306                                 XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 307                                                 PropModeReplace, (unsigned char *) &prop, 1);
 308                         }
 309
 310                         /* Set desired hints */
 311
 312                         /* Window decorations */
 313                         if (TEST_HINT(window.hints, HINT_UNDECORATED)) {
 314                                 /* fprintf(stderr, PACKAGE_NAME": hint - undecorated\n");
 315                                    fflush(stderr); */
 316
 317                                 xa = ATOM(_MOTIF_WM_HINTS);
 318                                 if (xa != None) {
 319                                         long prop[5] = { 2, 0, 0, 0, 0 };
 320                                         XChangeProperty(display, window.window, xa, xa, 32,
 321                                                         PropModeReplace, (unsigned char *) prop, 5);
 322                                 }
 323                         }
 324
 325                         /* Below other windows */
 326                         if (TEST_HINT(window.hints, HINT_BELOW)) {
 327                                 /* fprintf(stderr, PACKAGE_NAME": hint - below\n");
 328                                    fflush(stderr); */
 329
 330                                 xa = ATOM(_WIN_LAYER);
 331                                 if (xa != None) {
 332                                         long prop = 0;
 333
 334                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 335                                                         PropModeAppend, (unsigned char *) &prop, 1);
 336                                 }
 337
 338                                 xa = ATOM(_NET_WM_STATE);
 339                                 if (xa != None) {
 340                                         Atom xa_prop = ATOM(_NET_WM_STATE_BELOW);
 341
 342                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 343                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 344                                 }
 345                         }
 346
 347                         /* Above other windows */
 348                         if (TEST_HINT(window.hints, HINT_ABOVE)) {
 349                                 /* fprintf(stderr, PACKAGE_NAME": hint - above\n");
 350                                    fflush(stderr); */
 351
 352                                 xa = ATOM(_WIN_LAYER);
 353                                 if (xa != None) {
 354                                         long prop = 6;
 355
 356                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 357                                                         PropModeAppend, (unsigned char *) &prop, 1);
 358                                 }
 359
 360                                 xa = ATOM(_NET_WM_STATE);
 361                                 if (xa != None) {
 362                                         Atom xa_prop = ATOM(_NET_WM_STATE_ABOVE);
 363
 364                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 365                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 366                                 }
 367                         }
 368
 369                         /* Sticky */
 370                         if (TEST_HINT(window.hints, HINT_STICKY)) {
 371                                 /* fprintf(stderr, PACKAGE_NAME": hint - sticky\n");
 372                                    fflush(stderr); */
 373
 374                                 xa = ATOM(_NET_WM_DESKTOP);
 375                                 if (xa != None) {
 376                                         CARD32 xa_prop = 0xFFFFFFFF;
 377
 378                                         XChangeProperty(display, window.window, xa, XA_CARDINAL, 32,
 379                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 380                                 }
 381
 382                                 xa = ATOM(_NET_WM_STATE);
 383                                 if (xa != None) {
 384                                         Atom xa_prop = ATOM(_NET_WM_STATE_STICKY);
 385
 386                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 387                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 388                                 }
 389                         }
 390
 391                         /* Skip taskbar */
 392                         if (TEST_HINT(window.hints, HINT_SKIP_TASKBAR)) {
 393                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_taskbar\n");
 394                                    fflush(stderr); */
 395
 396                                 xa = ATOM(_NET_WM_STATE);
 397                                 if (xa != None) {
 398                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_TASKBAR);
 399
 400                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 401                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 402                                 }
 403                         }
 404
 405                         /* Skip pager */
 406                         if (TEST_HINT(window.hints, HINT_SKIP_PAGER)) {
 407                                 /* fprintf(stderr, PACKAGE_NAME": hint - skip_pager\n");
 408                                    fflush(stderr); */
 409
 410                                 xa = ATOM(_NET_WM_STATE);
 411                                 if (xa != None) {
 412                                         Atom xa_prop = ATOM(_NET_WM_STATE_SKIP_PAGER);
 413
 414                                         XChangeProperty(display, window.window, xa, XA_ATOM, 32,
 415                                                         PropModeAppend, (unsigned char *) &xa_prop, 1);
 416                                 }
 417                         }
 418                 }
 419
 420                 fprintf(stderr, PACKAGE_NAME": drawing to created window (0x%lx)\n",
 421                                 window.window);
 422                 fflush(stderr);
 423
 424                 XMapWindow(display, window.window);
 425
 426         } else
 427 #endif /* OWN_WINDOW */
 428         {
 429                 XWindowAttributes attrs;
 430
 431                 if (!window.window) {
 432                         window.window = find_desktop_window(&window.root, &window.desktop);
 433                 }
 434
 435                 if (XGetWindowAttributes(display, window.window, &attrs)) {
 436                         window.width = attrs.width;
 437                         window.height = attrs.height;
 438                 }
 439
 440                 fprintf(stderr, PACKAGE_NAME": drawing to desktop window\n");
 441         }
 442
 443         /* Drawable is same as window. This may be changed by double buffering. */
 444         window.drawable = window.window;
 445
 446 #ifdef HAVE_XDBE
 447         if (use_xdbe) {
 448                 int major, minor;
 449
 450                 if (!XdbeQueryExtension(display, &major, &minor)) {
 451                         use_xdbe = 0;
 452                 } else {
 453                         window.back_buffer = XdbeAllocateBackBufferName(display,
 454                                         window.window, XdbeBackground);
 455                         if (window.back_buffer != None) {
 456                                 window.drawable = window.back_buffer;
 457                                 fprintf(stderr, PACKAGE_NAME": drawing to double buffer\n");
 458                         } else {
 459                                 use_xdbe = 0;
 460                         }
 461                 }
 462                 if (!use_xdbe) {
 463                         NORM_ERR("failed to set up double buffer");
 464                 }
 465         }
 466         if (!use_xdbe) {
 467                 fprintf(stderr, PACKAGE_NAME": drawing to single buffer\n");
 468         }
 469 #endif
 470         window.visual = DefaultVisual(display, DefaultScreen(display));
 471         window.colourmap = DefaultColormap(display, DefaultScreen(display));
 472 #ifdef IMLIB2
 473         {
 474                 cimlib_init(display, window.drawable, window.visual, window.colourmap);
 475         }
 476 #endif /* IMLIB2 */
 477         XFlush(display);
 478
 479         XSelectInput(display, window.window, ExposureMask | PropertyChangeMask
 480 #ifdef OWN_WINDOW
 481                         | (own_window ? (StructureNotifyMask |
 482                                         ButtonPressMask | ButtonReleaseMask) : 0)
 483 #endif
 484                         );
 485 }
 486
 487 static Window find_subwindow(Window win, int w, int h)
 488 {
 489         unsigned int i, j;
 490         Window troot, parent, *children;
 491         unsigned int n;
 492
 493         /* search subwindows with same size as display or work area */
 494
 495         for (i = 0; i < 10; i++) {
 496                 XQueryTree(display, win, &troot, &parent, &children, &n);
 497
 498                 for (j = 0; j < n; j++) {
 499                         XWindowAttributes attrs;
 500
 501                         if (XGetWindowAttributes(display, children[j], &attrs)) {
 502                                 /* Window must be mapped and same size as display or
 503                                  * work space */
 504                                 if (attrs.map_state != 0 && ((attrs.width == display_width
 505                                                                 && attrs.height == display_height)
 506                                                         || (attrs.width == w && attrs.height == h))) {
 507                                         win = children[j];
 508                                         break;
 509                                 }
 510                         }
 511                 }
 512
 513                 XFree(children);
 514                 if (j == n) {
 515                         break;
 516                 }
 517         }
 518
 519         return win;
 520 }
 521
 522 long get_x11_color(const char *name)
 523 {
 524         XColor color;
 525
 526         color.pixel = 0;
 527         if (!XParseColor(display, DefaultColormap(display, screen), name, &color)) {
 528                 /* lets check if it's a hex colour with the # missing in front
 529                  * if yes, then do something about it */
 530                 char newname[DEFAULT_TEXT_BUFFER_SIZE];
 531
 532                 newname[0] = '#';
 533                 strncpy(&newname[1], name, DEFAULT_TEXT_BUFFER_SIZE - 1);
 534                 /* now lets try again */
 535                 if (!XParseColor(display, DefaultColormap(display, screen), &newname[0],
 536                                         &color)) {
 537                         NORM_ERR("can't parse X color '%s'", name);
 538                         return 0xFF00FF;
 539                 }
 540         }
 541         if (!XAllocColor(display, DefaultColormap(display, screen), &color)) {
 542                 NORM_ERR("can't allocate X color '%s'", name);
 543         }
 544
 545         return (long) color.pixel;
 546 }
 547
 548 void create_gc(void)
 549 {
 550         XGCValues values;
 551
 552         values.graphics_exposures = 0;
 553         values.function = GXcopy;
 554         window.gc = XCreateGC(display, window.drawable,
 555                         GCFunction | GCGraphicsExposures, &values);
 556 }
 557
 558 //Get current desktop number
 559 static inline void get_x11_desktop_current(Display *current_display, Window root, Atom atom)
 560 {
 561         Atom actual_type;
 562         int actual_format;
 563         unsigned long nitems;
 564         unsigned long bytes_after;
 565         unsigned char *prop = NULL;
 566         struct information *current_info = &info;
 567
 568         if (atom == None) return;
 569
 570         if ( (XGetWindowProperty( current_display, root, atom,
 571                                         0, 1L, False, XA_CARDINAL,
 572                                         &actual_type, &actual_format, &nitems,
 573                                         &bytes_after, &prop ) == Success ) &&
 574                         (actual_type == XA_CARDINAL) &&
 575                         (nitems == 1L) && (actual_format == 32) ) {
 576                 current_info->x11.desktop.current = prop[0]+1;
 577         }
 578         if(prop) {
 579                 XFree(prop);
 580         }
 581 }
 582
 583 //Get total number of available desktops
 584 static inline void get_x11_desktop_number(Display *current_display, Window root, Atom atom)
 585 {
 586         Atom actual_type;
 587         int actual_format;
 588         unsigned long nitems;
 589         unsigned long bytes_after;
 590         unsigned char *prop = NULL;
 591         struct information *current_info = &info;
 592
 593         if (atom == None) return;
 594
 595         if ( (XGetWindowProperty( current_display, root, atom,
 596                                         0, 1L, False, XA_CARDINAL,
 597                                         &actual_type, &actual_format, &nitems,
 598                                         &bytes_after, &prop ) == Success ) &&
 599                         (actual_type == XA_CARDINAL) &&
 600                         (nitems == 1L) && (actual_format == 32) ) {
 601                 current_info->x11.desktop.number = prop[0];
 602         }
 603         if(prop) {
 604                 XFree(prop);
 605         }
 606 }
 607
 608 //Get all desktop names
 609 static inline void get_x11_desktop_names(Display *current_display, Window root, Atom atom)
 610 {
 611         Atom actual_type;
 612         int actual_format;
 613         unsigned long nitems;
 614         unsigned long bytes_after;
 615         unsigned char *prop = NULL;
 616         struct information *current_info = &info;
 617
 618         if (atom == None) return;
 619
 620         if ( (XGetWindowProperty( current_display, root, atom,
 621                                         0, (~0L), False, ATOM(UTF8_STRING),
 622                                         &actual_type, &actual_format, &nitems,
 623                                         &bytes_after, &prop ) == Success ) &&
 624                         (actual_type == ATOM(UTF8_STRING)) &&
 625                         (nitems > 0L) && (actual_format == 8) ) {
 626
 627                 if(current_info->x11.desktop.all_names) {
 628                         free(current_info->x11.desktop.all_names);
 629                         current_info->x11.desktop.all_names = NULL;
 630                 }
 631                 current_info->x11.desktop.all_names = malloc(nitems*sizeof(char));
 632                 memcpy(current_info->x11.desktop.all_names, prop, nitems);
 633                 current_info->x11.desktop.nitems = nitems;
 634         }
 635         if(prop) {
 636                 XFree(prop);
 637         }
 638 }
 639
 640 //Get current desktop name
 641 static inline void get_x11_desktop_current_name(char *names)
 642 {
 643         struct information *current_info = &info;
 644         unsigned int i = 0, j = 0;
 645         int k = 0;
 646
 647         while ( i < current_info->x11.desktop.nitems ) {
 648                 if ( names[i++] == '\0' ) {
 649                         if ( ++k == current_info->x11.desktop.current ) {
 650                                 if (current_info->x11.desktop.name) {
 651                                         free(current_info->x11.desktop.name);
 652                                         current_info->x11.desktop.name = NULL;
 653                                 }
 654                                 current_info->x11.desktop.name = malloc((i-j)*sizeof(char));
 655                                 //desktop names can be empty but should always be not null
 656                                 strcpy( current_info->x11.desktop.name, (char *)&names[j] );
 657                                 break;
 658                         }
 659                         j = i;
 660                 }
 661         }
 662 }
 663
 664 void get_x11_desktop_info(Display *current_display, Atom atom)
 665 {
 666         Window root;
 667         static Atom atom_current, atom_number, atom_names;
 668         struct information *current_info = &info;
 669         XWindowAttributes window_attributes;
 670
 671         root = RootWindow(current_display, current_info->x11.monitor.current);
 672
 673         /* Check if we initialise else retrieve changed property */
 674         if (atom == 0) {
 675                 atom_current = XInternAtom(current_display, "_NET_CURRENT_DESKTOP", True);
 676                 atom_number  = XInternAtom(current_display, "_NET_NUMBER_OF_DESKTOPS", True);
 677                 atom_names   = XInternAtom(current_display, "_NET_DESKTOP_NAMES", True);
 678                 get_x11_desktop_current(current_display, root, atom_current);
 679                 get_x11_desktop_number(current_display, root, atom_number);
 680                 get_x11_desktop_names(current_display, root, atom_names);
 681                 get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 682
 683                 /* Set the PropertyChangeMask on the root window, if not set */
 684                 XGetWindowAttributes(display, root, &window_attributes);
 685                 if (!(window_attributes.your_event_mask & PropertyChangeMask)) {
 686                         XSetWindowAttributes attributes;
 687                         attributes.event_mask = window_attributes.your_event_mask | PropertyChangeMask;
 688                         XChangeWindowAttributes(display, root, CWEventMask, &attributes);
 689                         XGetWindowAttributes(display, root, &window_attributes);
 690                 }
 691         } else {
 692                 if (atom == atom_current) {
 693                         get_x11_desktop_current(current_display, root, atom_current);
 694                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 695                 } else if (atom == atom_number) {
 696                         get_x11_desktop_number(current_display, root, atom_number);
 697                 } else if (atom == atom_names) {
 698                         get_x11_desktop_names(current_display, root, atom_names);
 699                         get_x11_desktop_current_name(current_info->x11.desktop.all_names);
 700                 }
 701         }
 702 }
 703
 704 void update_x11info(void)
 705 {
 706         struct information *current_info = &info;
 707         if (!x_initialised == YES)
 708                 return;
 709         current_info->x11.monitor.number = XScreenCount(display);
 710         current_info->x11.monitor.current = XDefaultScreen(display);
 711 }
 712
 713 #ifdef OWN_WINDOW
 714 /* reserve window manager space */
 715 void set_struts(int sidenum)
 716 {
 717         Atom strut;
 718         if ((strut = ATOM(_NET_WM_STRUT)) != None) {
 719                 /* reserve space at left, right, top, bottom */
 720                 signed long sizes[12] = {0};
 721                 int i;
 722
 723                 /* define strut depth */
 724                 switch (sidenum) {
 725                         case 0:
 726                                 /* left side */
 727                                 sizes[0] = window.x + window.width;
 728                                 break;
 729                         case 1:
 730                                 /* right side */
 731                                 sizes[1] = display_width - window.x;
 732                                 break;
 733                         case 2:
 734                                 /* top side */
 735                                 sizes[2] = window.y + window.height;
 736                                 break;
 737                         case 3:
 738                                 /* bottom side */
 739                                 sizes[3] = display_height - window.y;
 740                                 break;
 741                 }
 742
 743                 /* define partial strut length */
 744                 if (sidenum <= 1) {
 745                         sizes[4 + (sidenum*2)] = window.y;
 746                         sizes[5 + (sidenum*2)] = window.y + window.height;
 747                 } else if (sidenum <= 3) {
 748                         sizes[4 + (sidenum*2)] = window.x;
 749                         sizes[5 + (sidenum*2)] = window.x + window.width;
 750                 }
 751
 752                 /* check constraints */
 753                 for (i = 0; i < 12; i++) {
 754                         if (sizes[i] < 0) {
 755                                 sizes[i] = 0;
 756                         } else {
 757                                 if (i <= 1 || i >= 8) {
 758                                         if (sizes[i] > display_width) {
 759                                                 sizes[i] = display_width;
 760                                         }
 761                                 } else {
 762                                         if (sizes[i] > display_height) {
 763                                                 sizes[i] = display_height;
 764                                         }
 765                                 }
 766                         }
 767                 }
 768
 769                 XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 770                                 PropModeReplace, (unsigned char *) &sizes, 4);
 771
 772                 if ((strut = ATOM(_NET_WM_STRUT_PARTIAL)) != None) {
 773                         XChangeProperty(display, window.window, strut, XA_CARDINAL, 32,
 774                                         PropModeReplace, (unsigned char *) &sizes, 12);
 775                 }
 776         }
 777 }
 778 #endif /* OWN_WINDOW */
 779
 780 #ifdef HAVE_XDBE
 781 void xdbe_swap_buffers(void)
 782 {
 783         if (use_xdbe) {
 784                 XdbeSwapInfo swap;
 785
 786                 swap.swap_window = window.window;
 787                 swap.swap_action = XdbeBackground;
 788                 XdbeSwapBuffers(display, &swap, 1);
 789         }
 790 }
 791 #endif /* HAVE_XDBE */
 792